The biomass is likely to increase in the sequence

Primary consumers are found in

(a)  State two roles each of the following compounds in respiration:
(i)   glucose;
(ii)  oxygen.                                              
(b) List two types of cellular respiration                                 
(c) Name the structures of gaseous exchange in the following organisms:

(d) Make a diagram, 6 cm to 8 cm long of an open stoma in a leaf and label fully.  

(a)Describe briefly the process involved in the conversion of food to chyme in the stomach of a mammal.                                                                                                          
(b)Complete the table below by stating one enzyme, digestive juice, food acted upon and
end-product in the corresponding spaces.

(c) Describe an experiment to show that carbon dioxide is necessary for photosynthesis.

(a)  Explain briefly the following terms:

1. ecosystem;
2. abiotic environment.                                                         

(b)  List three ecological factors each which are specific to:

1. aquatic habitats;
2. terrestrial habitats.                                                           

(c)  State briefly the relationship between green grass and a rabbit in a given habitat.
(d)  Draw a typical pyramid of energy using four feeding levels.